Messages in this thread |  | | | Date | Fri, 1 Oct 2004 13:42:43 +0100 | | From | Matthew Wilcox <> | | Subject | Re: [Ext2-devel] Re: [Patch 7/10]: ext3 online resize: SMP locking for group metadata |
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On Fri, Oct 01, 2004 at 12:40:38PM +0100, Stephen C. Tweedie wrote: > So I don't want to make it atomic if I can avoid it. It's just an > unsigned long, and I don't know of any cases where a simple read > colliding with a write is going to give the reader a corrupt value. As > long as I get either the old or new value, everything should be fine > with the read/write barriers as they are.
I think all Linux architectures guarantee atomic updates of a register-sized naturally-aligned piece of memory.
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